Frameless Shower Glass Panel shrinking from Frame

I had my home remodeled for about 2 years. The bathroom was completely redone and I had a frameless shower setup. Something I noticed recently is on a side where the glass goes into the metal frame where its attached to the wall. The glass has moved out of the frame, leaving a small gap where I can put a toothpick through the gap and it will come out on the other side.

Glass -> Metal Frame -> Wall

The glass and the clear caulking has moved away partially from the metal frame, a good foot up and down the frame. I am not sure if its the Wall that has moved because its summer time and the heat has made the wood shrink, or what is happening.

Anyone have similar problems or is this something bigger that I don't know.